1 /* 2 * QEMU PowerPC helper routines for the device tree. 3 * 4 * Copyright (C) 2016 IBM Corp. 5 * 6 * This code is licensed under the GPL version 2 or later. See the 7 * COPYING file in the top-level directory. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "target/ppc/cpu.h" 12 #include "target/ppc/mmu-hash64.h" 13 14 #include "hw/ppc/fdt.h" 15 16 #if defined(TARGET_PPC64) 17 size_t ppc_create_page_sizes_prop(PowerPCCPU *cpu, uint32_t *prop, 18 size_t maxsize) 19 { 20 size_t maxcells = maxsize / sizeof(uint32_t); 21 int i, j, count; 22 uint32_t *p = prop; 23 24 for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) { 25 PPCHash64SegmentPageSizes *sps = &cpu->hash64_opts->sps[i]; 26 27 if (!sps->page_shift) { 28 break; 29 } 30 for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) { 31 if (sps->enc[count].page_shift == 0) { 32 break; 33 } 34 } 35 if ((p - prop) >= (maxcells - 3 - count * 2)) { 36 break; 37 } 38 *(p++) = cpu_to_be32(sps->page_shift); 39 *(p++) = cpu_to_be32(sps->slb_enc); 40 *(p++) = cpu_to_be32(count); 41 for (j = 0; j < count; j++) { 42 *(p++) = cpu_to_be32(sps->enc[j].page_shift); 43 *(p++) = cpu_to_be32(sps->enc[j].pte_enc); 44 } 45 } 46 47 return (p - prop) * sizeof(uint32_t); 48 } 49 #endif 50